I've just bought a pair of Bilstein shocks for my '86 560SL and am getting ready to install them. However, when I opened the box, I was somewhat surprised to find that they were supplied with a only single lock nut for the upper stem mount, and not the double nut design that is fitted to the cars current shocks. Is this a change in design for Bilstein, or am I missing a nut?

Whilst on this subject, does anyone use thread locking compound on the upper or lower nuts that secure the shock?